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ID 41488
file
title alternative
Life Cycle of Alella macrotrachelus (Copepoda) Parasitic on Cultured Black Sea-bream
creator
Kawatow, Katsuyasu
Muroga, Kiyokuni
Izawa, Kunihiko
Kasahara, Shogoro
NDC
Fishing industry. Fisheries
abstract
Recently, industrial farming of black sea-bream, Acanthopagrus schlegeli (Bleeker), has grown prosperous in the Inland Sea of Japan. This species is said to be fairly resistant to environmental water pollution and diseases as compared with yellow tail, Seriola quinqueradiata, a popular species in mariculture of our country. However, some ectoparasites are known to attack cultured black sea-bream. Among them, Alella macrotrachelus (Brian, 1906) (Copepoda: Lerneopodidae) with which we deal here seems to be the most harmful gill parasite.

In this paper the development of this parasite is described, based on specimens from laboratory experiments.

The female life cycle proved to consist of seven stages; one nauplius stage, one copepodid stage, four chalimus stages (attached by frontal filament), and the adult stage (attached by bulla). The life cycle of the male could not be revealed thoroughly, but it is clear that the male gets into the life of superinfection on the female at its second chalimus stage. Sexual dimorphism becomes distinct in the second chalimus stage.
journal title
Journal of the Faculty of Applied Biological Science, Hiroshima University
volume
Volume 19
issue
Issue 2
start page
199
end page
214
date of issued
1980-12-25
publisher
広島大学生物生産学部
issn
0387-7647
ncid
naid
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Biosphere Science
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